have a one-track mind

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have a one-track mind

To be consistently fixated on or preoccupied by a particular topic. Jerry, you have such a one-track mind; not everything has to do with sex. My sister has a one-track mind, only thinking about how something can further her career.
See also: have, mind

have a one-track mind

Fig. to think entirely or almost entirely about one subject. Adolescent boys often have one-track minds. All they're interested in is the opposite sex. Bob has a one-track mind. He can only talk about football.
See also: have, mind

have a one-track mind

If someone has a one-track mind, they always think or talk about one subject. He has a one-track mind when he's working on a project — he thinks of nothing else. No, Sam, I wasn't referring to sex. You've a one-track mind, that's your trouble! Note: This expression is often used in a humorous way to say that someone thinks or talks a lot about sex. Note: This probably refers to a single-track railway, which will only allow trains to move in a single direction.
See also: have, mind